# Column Names / Mapping
Marketing OS uses a convention over configuration strategy. In particular we use column names to avoid the need for a mapping step.
# Columns/Names Required
Please add columns with these exact names (or rename existing columns):
- Phone - this is a column containing phone numbers. This is used by SMS, WhatsApp and ad-targeting.
- Email - this is a column containing email addresses. This is used by Email and ad-targeting.
- Address - this is a column containing the recipient's entire address (including e.g. house, road, city & state). We recommend a large text column with the address formatted on multiple lines.
By making an assumption about column-names, we entirely eliminate the need for data-mapping! 😃